Forgive me, but please explain how you are determining the failure rate based on MS's financials. Can you break it down?
http://www.beyond3d.com/forum/showpost.php?p=916627&postcount=1
If Microsoft was at a 30-50% failure rate like some are suggesting their operating loses wouldn't of narrowed by 17%. Realistically they would of increased the other way. Especially at a number like $383 million.
I speculate if they were even at a 30% failure rate, the operating loses for that half could of been in the $500-$700 million range if not higher.